Pen



Mar. 3. 1925.

A. FORSELL ET AL PEN Filed Jan. 30, 1925 gZZZh/ff/n Patented Mar. 3,1925.

UNITED ,STATES PA'LIEN'TJOFIFICE.

PEN.

Applloatibn filed January so, 192:. Serial No. 515,842.

To all eohom it may concern:

"Be it known that we,

United States, and residents-of Blue Island, in the county'of Cook'andState of Illinois, have invented certainnew and useful Improvements in aPen, of which the following is a specification.

Our present invention relates to improve; ments in pens, and has specialreference to pens of the fountain type which are adapted to take inkorother writing fluid during the o eration of writing from a reservoircontaming a supply of the writing fluid. The special objects of ourinvention are, first, the provision of a pen which may be employed'forwriting on a great many different materials and surfaces, whether softor hard or comparatively rough or comparatively smooth; second, theprovision of a pen which will be comparatively free from wear incidentto the friction of the writing point against the writing surface; third,the provision of a pen "which" may be readily adjusted forwriting fluidsof different fluidity; and, fourth, the provision of a pen of few andsimple parts not liable to get out of order and easily replaced whichmay be manufactured and assembled economically, and sold at a moderateprice. We prefer to attain the foregoing objects by means of thestructure illustrated in the accompanying drawings, in which- Fig. 1 isa central longitudinal section of i a pen embodying our invention, drawnto an exaggerated scale for greater clearness.

Fig. 2 is a perspective view of a feed adjusting plug, and

Fig. 3 is a perspective view of a modified type of ball adapted tohandle a heavier and more viscid fluid, andsuitable for use in labelingand addressing packages and boxes for shipment.

,Our en comprises a reservoir of any desired ibrm or configuration. Wehave shown such a reservoir of a conventional pattern consisting of acylindrical tube 5 closed at one end 6, and interiorly threaded at theother end 7. Into threaded end 7 of the reservoir is screwed the rear orposterior end of a hollow. conical nozzle 8,

the forward or anterior portion of which suitably truncated. The

' threaded portion 10 of the nozzle is reduced and shouldered so thatthe exterior surfaces ARTHUR Fonsnm; and ROBERT H. Haniuony'citizens ofthe.

posterior of the nozzle and reservoir will be tically flush.

Into the rear end of the nozzle is dropped a ball "or' sphere 11 of asize to fit the anpracterior cavity therein with just enough play toprovide a capillary clearance between the ball and the surface of thecavity, and the cavity being slightly greater than a hemisphere willprevent the ball from falling through the truncated end thereof. Thebill may be made of any suitable material, either metal'or anon-corrosive composition, as the rotation thereof in its cavityeliminates, or, at least, greatly reduces wear between the ball and thewriting surface, and the anterior end of the .bore of the nozzle ischanneled, as at 14.

The interior of the posterior elidof the nozzle is also threaded toreceive the threaded. slightly enlarged posterior end 11 of the ballretaining and feed adjusting plug 12, the anterior end of which isprovided with a spherical depression 1.3 to conform to-the surface ofthe ball and the size of which plug is proportioned to fill the conicalinterior cavity of the nozzle with a slight possibility of longitudinaladjustment. Upon the exterior of plug 12 are provided a plu ral'ity oflongitudinal capillary channelsl for the passage of the writing fluidfrom the reservoir to the ball. We haveprovided four such channels, butthe number thereof is immaterial, as it will be seen that the rotationof the ball through its friction with the writing surface will wipe ordraw the writing fluid from the ends of the channels, and that byscrewing plug 12 further in or out the amount of the fluid withdrawnfrom the channels may be controlled. This, as will be readily perceived,provides an adjustment for regulating the pen for use with writinginksof different fluidity. A screw slot 15 may be provided in the rearor posterior end of plug 12 to receive the blade of a screw driver withwhich adjustments may be facilitated. We have shown the exterior ends ofthe reservoir slightly tapered in the ing fluid from the capillarychannels, and is peculiarly suitable for use in addressing packages,boxes, etc, and for all work or service requiring considerable ot' thewriting fluid. \Ve have found with balls as large as an eighth of aninch in diameter the lines are surprisingly fine and clear, and our pensmay be employed upon writing surfaces as delicate as tissue and as hardas stone-with equal facility.

What we claim new is:

1. A pen having a reservoir, a hollow nozzle' provided with an anteriorsphere retaining cavity, means for establishing a feed from saidreservoir to said cavity and a striated sphere revolvably seated in saidcavity. r

2. A pen comprising a reservoir having a hollow conical nozzle providedwith an anterior sphere retaining cavity, a sphere revolvably seated insaid cavity, and a conical plug seated within said nozzle and havingthreaded relation therewith, whereby the adjustment of the sphere andits seat may be controlled, said plug having longitudinal channelsleading from said reservoir to said cavity.

3. A pen comprising a reservoir, a hollow nozzle for said reservoir;said nozzle being provided with an anterior sphere retaining cavity. astriated sphere revolvably seated in said cavity, a longitudinallychanneled conical plug disposed within said nozzleand having threadedrelation therewith, providing facilities for adjusting the relation ofsaid sphere to said cavity and the flow of fluid from the reservoirtosaid cavity.

4. A pen having a reservoir, a hollow conical nozzle provided with ananterior sphere retaining cavity, a sphere having intersectingstriations revolvably seated in said cavity, and a conical plug seatedWithin said nozzle having channels establishing a feed between saidreservoir and said cavity.

5. A pen comprising a reservoir, a hollow conical nozzle for saidreservoir; said nozzle being provided with an anterior sphere retainingcavity, a sphere revolvably seated in said cavity, and a longitudinallychanneled conic-a1 plug disposed within said nozzle between saidreservoir and said cavity.

Signed at Chicago, county of Cook and State of Illinois, this 24th dayof January,

' ARTHUR FORSELL.

ROBERT H. HARMON.

